Attributes of a management class

Each management class contains all its backup, version backup and migration attributes. When the name of a management class is assigned to an object, the entire HSMS strategy is thus also assigned to it.

A distinction is made between the following attributes:

1. Attributes which define preconditions to be met before objects of an SM pubset are eligible for backup or migration (e.g. the attribute UNUSED-DAYS for migration).

2. Attributes which define the required result of a backup, a version backup or a migration (e.g. the attribute TO-STORAGE for migration).

All the attributes are described below. The possible values of an attribute can be found in "HSMS Vol. 2" [1] under the HSMS statement CREATE-MANAGEMENT-CLASS.

• Attribute for backup

  RETENTION-PERIOD (type 2)
  Minimum retention period for the save file that contains the object.

• Attributes for migration from S0 level (not for job variables)

  UNUSED-DAYS (type 1)
  Minimum number of days an object must remain unused to be eligible for migration to a background level.

  MINIMUM-SIZE (type 1)
  Minimum number of PAM pages an object must have to be eligible for migration to a background level.

  MAXIMUM-SIZE (type 1)
  Maximum number of PAM pages an object may have to be eligible for migration to a background level.

  MINIMUM-EXTENTS (type 1)
  Minimum number of extents a file must have to be eligible for migration to a background level.

  TO-STORAGE (type 2)
  Background level to which the object is to be migrated.

• Attributes for migration from S1 level

  MINIMUM-DAYS-ON-S1 (type 1)
  Minimum number of days an object must be on S1 to be eligible for further migration to S1 or S2.

  MAXIMUM-DAYS-ON-S1 (type 1)
  Maximum number of days an object may be on S1 to be eligible for further migration to S2.

  MINIMUM-SIZE (type 1)
  Minimum number of PAM pages an object must have to be eligible for migration to S1 or S2.

  TO-STORAGE (type 2)
  Background level to which the object is to be migrated.

• Attributes for version backup 
  NUM-OF-BACKUP-VERS (type 2)
  The number of backup versions, which are kept within a version backup archive.